Boiler.



PATENTED JAN. l5, 1907. J. P. SNBDDON.

BOILER.

APPLICATION FILED JAN. 25, 1905` .s sHEETs--SHEET 2.

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J. P. SNEDDON.

BOILER.

APPLICATION FILED JAN. 25, 1905,

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

JAMES P. SNEDDON, OF BARBERTON, OHIO, ASSIGNOR TO THE STIRLING CONSOLIDATED BOILER COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW JERSEY.

BOILER.

Patented Jan. 15, 1907.

Application filed January 25, 1905. Serial N0- 242,628.

T 0 @ZZ whom t Tf1/(ffy concern:

Be it known that I, JAMES P. SNEDDON, of Barberton, Summit county, Ohio, have invented a new and useful Water-Tube Boiler, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a front elevation, partly broken away, showing a water-tube boiler constructed in accordance with my invention. Fig. 2 is a vertical cross-section of the same. Fig. 3 is a detailed view of the form of Figs. 1 and 2. Fig. 3a is a detailed modification. Fig. 4 is a detail view showing modifi cation of the form of Fig. 3. Fig. 5 is a front elevation showing my invention in connection with an intermediate water-leg. Fig. 6 is a detailed view showing a modified arrangement of the lintel. Fig. 7 is a longitudinal vertical section showing another form of water-tube boiler with my improved lintel and water-leg construction, and Fig. 8 is a front elevation of the form of Fig. 7.

My invention relates to the class of watertube boilers, and is designed to improve their structure, especially those of the Niclausse type, particularly as to the water-lintel construction and the use of squared or elliptical tubes forming the sides of the fire-box.

In the drawings, referring to the form of Figs. 1, 2, and 3, 2 represents the upper transverse steam and water drum. 3 is the vertically-extending serpentine headers depending thereform, and 4 the front corner-boxesl 'which extend down below the water-lintels to about the level of the grate.

The sides of the furnace chamber are formed by squared or elongated tubes 5, which extend in a general horizontal direction and are preferably inclined rearwardly and downwardly to correspond to the inclination of the generating-tubes 6. These generating-tubes are closed at their rear ends, as in the usual Niclausse type, and the tubes 5 are also closed at their rear ends.

Below the lower ends of the front headers extend the horizontal water-box or fire-lintel 7, which in the form shown is connected to the headers by U-shaped pipes 8, these pipes preferably constituting the only water connections of the lintel, which is closed at its ends. The ends of the lintel are spaced apart slightly from the front corner-boxes, so as to allow for expansion and contraction.

In Fig. 3 I show the corner-box 4 as having the usual Niclausse partition 9, terminating at or above the upper tube 5 of the furnacelining tubes, and I show these tubes as connected to the lower portion of the box by nipples 10, which may be expanded in place. The box is provided with front hand-holes 1l, closed by hand-hole plates 12, as shown in Fig. 1, to give access into .the tubes 5.

In Fig. 3a I show the partition 9a as having a bottom 9b extending over and closing the bottom of the compartment. This bottom 9b may extend either forward or rearwardly.

In Fig. 4 I show the partition 9a of the corner water-box as extending to its lower end. In this case the circular tubes 13 extend from the partition rearwardly within the squared tubes 5.a, this form being otherwise the same as that of Figs. 1, 2, and 3.

In Fig. 5 I show a similar construction, in which an intermediate water-leg 14 is provided, preferably by an integral downward extension of the central header. This leg extends down to the same level as the front corner water-boxes 4b, and connected to it are square or elliptical tubes, which correspond to the lining-tubes at the sides of the furnace-chamber. The furnace-chamber is thus divided into two compartments, while the intermediate leg serves to support the intermediate part of the structure. This water-leg 14 may be formed separately from the header, if desired, and secured in place beneath it, being preferably water-connected thereto. In this form the water-lintel is made in separate sections 7b, each section having the U-shaped pipes 8b connected into the lower front ends of the headers. In this case, asin the form of Fig. l, the ends of each water-lintel are closed, with a clearance between them and the water-legs.

Instead of making the lintel with both ends closed I may connect one end to one of the water-legs or water-boxes. Thus in Fig. 6 I showthe lintel 7c as connected to the corner water-column or water-leg 4c by a nipple 15, the other end of the water-lintel being closed.

I have found that it is important that not more than one end of the water-lintel should be nippled or connected to a water-leg, since IOO if both ends are so connected the expansion of the lintel under heat will cause leakage at one or both of the end joints. If connected at one end only or closed at both ends, the lintel is allowed to expand toward one or both ends without causing leakage. One or both ends of the water-lintel may be supported upon a structural support, as shown at 16 in Fig. 6.

The feature of using a water-lintel which is connected at not more than one end to the water-leg or water corner-box is applicable to Other types of boilers. Thus in Figs. 7 and 8 I show a boiler having front and rear headers 17 18, connected by water-tubes 19. I have shown this form as having intermediate waterelegs 20 and 21 at the front and rear, which are connected by the squared or elliptical tubes 22, dividing the furnace-chamber. The corner water-columns 23 are extended down past the firing-doors and provided with similar squared or elliptical tubes leading to corresponding rear corner water-boxes and forming the sides of the combustion-chamber. In this form 24 are the water-lintels, which are shown as nippled into the bottom ends of the front headers, these water-lintels being preferably closed at both ends, as shown, although one end of each may be nippled or 'connected to the corresponding water-leg. Clearance is provided between the unconnected end or ends of the lintel and the corresponding water-leg or water-boxes.

In any of the forms shown if one nipple connection is used for the end of the lintel it may be placed at either end.

In the Niclausse type of boiler the usual steam-generating tubes may be used with or without inner circulating-tubes, and the diaphragms in the headers may or may not be used, as desired.

The advantages of my invention result especially from the providing of the lliclausse boiler with a water-lintel and water-tube 'sides for the furnace. I have found that I can eiiiciently use squared or elliptical tubes with closed rear ends for forming the sides of the combustion-chamber and the dividingwall, if such is employed. The construction of water-lintel is highly advantageous, as it prevents leaking when the parts are subjected. to heat and may be used either in the Niclausse boiler or in other forms of watertube boilers.

Many variations may be made in the form and arrangement of the lining-tubes, the water-lintel, &c., without departing from my invention.

I claim- 1. A steam-boiler furnace having front water-legs and inclined water-tubes leading rearwardly therefrom and dening a coinbustion-chamber, the rear ends of the tubes being closed, substantially as described.

2. A steam-boiler furnace having front water-legs and inclined water-tubes leading rearwardly therefrom and defining a com?. bustion-chamber, the rear ends of the tubes being closed and unconnected., substantially as de cribed.

3. A steam-boiler furnace having front headers, front water-legs extending below the headers, and inclined water-tubes leading rearwardly from the legs below the headers and defining a combustion-chamber, the rear ends of the tubes being closed, substantially as described.

4. A steam-boiler furnace having front headers, front water-legs extending below the headers, and inclined water-tubes leading rearwardly from the legs below the headers and defining a combustion-Chamber, the rear ends of the tubes being closed and. unconnected, substantially as described.

5. A steam-boiler furnace having front upright water-legs, a steam-drum supported thereon and in communication therewith, headers depending from the drum between the legs and terminating short of the bottoms of the legs, and inclined. water-tubes leading rearwardly from the legs below the headers and defining a combustion-chamber, the water-tubes being in communication with the waterelegs only and having their rear ends closed, substantially as described.

6. A steam-boiler furnace having a series of upright headers, a steam-drum upon the tops of the headers, certain of the headers extending below the remaining headers and forming water-legs for the support of the drum, and inclined water-tubes leading rearwardly from the legs below the headers and defining a combustioli-chamber, the water tubes being in communication with the water-legs only and having their rear ends closed, substantially as described.

7. A steam-boiler furnace having front upright water-legs, a steam-drum supported thereon and in communication therewith, headers depending from the .drum between the legs and terminating short of the botrearwardly from the legs below the headers and defining a combustion-chamber, the water-tubes being in communication with the water-legs only and closed at their rear ends, and a water-lintel below and in communication with the headers, substantially as described.

8. A steam-boiler furnace having front upright water-legs, a steam-drum supported thereon and in communication therewith, headers depending from the drum between the legs and terminating short of the bottoms of the legs, water-tubes leading rearwardly from the legs below the headers and defining a combustion-chamber, the watertubes being in communication with the wal ter-legs only and closed at their rear ends, l and a water-lintel below and in communica toms of the legs, inclined water-tubes leading IOO IIO

tion with the headers, at least one end of I the lintel being closed, substantially as described.

9. A water-tube boiler having `front headers with rearwardly-extending tubes connected thereto and having closed rear ends, front corner water-boxes in the plane of the headers extending below the headers and provided with rearwardlyextending tubes having closed rear ends forming at least a part of the sides of the 'furnace-chamber, and a transverse water-lintel extending` below the headers and having water connection therewith, at least one end of the lintel being closed substantially as described.

10. A water-tube boiler having front headers with rearwardly-extending tubes having closed rear ends connected thereto, front corner water-boxes, and an intermediate waterbox extending below and supporting their front headers, rearwardly-extending tubes connected to the water-boxes, said tubes having closed rear ends and forining at least a part of the sides of the combustion-charnbers, and water-lintels extending transversely between the water-legs and connected to the front headers, at least one end of each lintel being closed, substantially as described.

11. A water-tube boiler having front headers with rearwardly-extending tubes having closed rear ends connected thereto, front corner water boxes, intermediate waterboxes extending below and supporting their front headers, rearwardly-extending tubes connected to the water-boxes, said tubes having closed rear ends and forming at least a part of the sides of the combustion-chainbers, and water-lintels extending transversely between the water-legs and connnected to the front headers, both ends of the water-lintels being closed, substantially as described.

12. A water-tube boiler .having iront vertically-extending headers connected at their upper ends to a steam and water druin, rearwardly-extending tubes having closed rear ends connected to the headers, front corner supporting water-boxes extending below the headers, rearwardly-extending tubes having closed rear ends connected to the corner water-boxes, a water-lintel extending below the headers and between the corner waterboxes, said lintel having at least one end closed and connected to the lower parts of the headers by U-shaped pipes; substantially as described.

13. A water-tube boiler having front headers provided with rearwardly-extending water-tubes, a transverse steani and water dru'in extending above the headers and connected directly to their upper ends, and a front water-lintel extending transversely below the headers and connected directly thereto, said water-lintel having at least one end closed, and being closed on its lower face; substantially as described.

111'. A water-tube boiler having Jfront headers with rearwardly-extending water-tubes connected thereto, a transverse stea'in and water druni extending over the headers and directly connected thereto, and a transverse water-lintel extending below the headers and connected thereto, said lintel having at least one end closed with its rear face closed and exposed directly to the 'furnace-chamber; substantially as described.

15. A water-tube boiler having front headers with rearwardly-extending water-tubes connected thereto, a transverse steain and water druni extending over the headers and directly connected thereto, and a transverse water-lintel extending below the headers and connected thereto, said lintel having both ends permanently closedl with its rear face closed and exposed directly to the furnace-chamber; substantially as described.

16. Awater-tube boiler having front headers with rearwardly-extending water-tubes connected thereto, and a transverse waterintel extending below and connected to the headers, said water-lintel having at least one end closed and being closed on its bottom and rear Jraces; substantially as described.

17. A water-tube boiler having Jfront headers with rearwardly-extending water-tubes connected thereto, corner water-boxes below the headers, and a water-lintel extending transversely below the headers and connected directly thereto, said lintel having at least one end closed and being closed on its bottoni and rear faces, substantially as described.

1S. A water-tube boiler having front headers with rearwardly-extending water-tubes, front corner water-boxes, and an intermediate water-box extending below the headers, water-tubes extending 'rearwardly from the water-boxes, and forming at least a part of the sides of the combustion-chambers, and transverse lintels extending below the headers and connected thereto, said lintels having at least one end closed and being closed on their bottoni and rear faces and exposed to the interior of the furnace; substantially as described.

19. A water-tube boiler having sinuous front headers with rearwardly-extending water-tubes, the corner-headers having depending supporting water-legs, rearwardlyextending water-tubes connected to the water-legs and forming the sides of the cornbustion-chainber, and a transverse waterlintel extending below the headers and connected thereto, said water-'lintel having at least one end closed and being closed on its bottoni face; substantially as described.

20. A water-tube boiler having front headers with rearwardly-extending water-tubes connected thereto, a transverse water-lintel extending below the headers and connected thereto, said lintel being closed on its bot- IOO TIO

tom face, and corner water-boxes spaced apart slightly from the ends of the waterlintel said water-lintel having at least one end closed; substantially as described.

21. A water-tube boiler having front headers, and front corner water-boxes, a waterlintel extending transversely below the headers and connected thereto, both ends of the lintel being closed, and corner water-boxes spaced apart from the ends of the lintel and having rearwardly extending water tubes forming the sides oi the combustion-chamber g substantially as described.

22. A water-tube boiler having front vertically-extending headers, iront corner supporting water boxes with rearwardly extending tubes Yforming the sides of the combustion-chamber, a transverse steam and water drum extending over the headers and connected directly thereto, a water-lintel extending transversely below the headers and connected thereto7 at least one end of the water-lintel being closed, the bottom and rear faces of the lintel being also closed; substantially as described.

23. A Water-tube boiler having front vertically-extending headers, front corner water boxes, and an intermediate supporting Water leg below an intermediate header, said boiler having water-lintels extending between the water-leg and the corner water-boxes, each of said water-lintels having at least one end closed, and being water-connected to the lower portions of the headers; substantially as described.

2.4L. A water-tube boiler having iront vertically-extending headers, iront corner waterj boxes, and an intermediate supporting waterleg below an intermediate header, said boiler having water-lintels extending between the water-leg and the corner water-boxes, each of said water-lintels having at least one end closed., and being water-connected to the lower portions or' the headers, the corner water-boxes and intermediate waterleg having rearwarelly-extending squared or elliptical tubes 'forming the sides of the combustion* chamber; substantially as described.

In testimony whereof I have hereunto set my hand.

JAMES P. SNEDDON. Witnesses:

J. E. BELL, W. T. LUCAS. 

